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    <title>Document</title>
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    <script>
        var arr1 = ['星期一','星期二','星期三','星期四','星期五','星期六','星期日']
        var num = Number(prompt());
        // console.log(arr1[num])  ---0-6
        for(var i=0;i<arr1.length;i++){
            if(num == i+1){
                console.log(arr1[i])
            }
        }
        
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